A Series Diesel Engine Electrical System 139
Engine Cranking Speed Too Slow
Make sure the wiring connections are clean, tight and
not damaged.
Check the battery voltages.
If the engine was not rotated to check the starting
motor (page 7-8), bar the engine in the direction of
engine rotation to make sure the engine is free and
does not have an internal malfunction.
If the engine is free, check the voltage at the starter
during cranking. If the voltage drops more than 2.4
volts, check that all connections are tight. The limit for
24 volt systems is 4.8 volts.
If the cable correct and the voltage drop exceeds the
limit, replace the starter.
If the engine requires more than a normal effort to bar,
check for excessive load from the driven units and
accessories.
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